Installs and launches GNU Octave. Not some similar program, but really Octave running natively.
For you to be able to launch GNURoot Octave you need to install GNURoot Debian.
You can add .m files and a .octaverc startup file in an external storage directory setup for you. Often at /sdcard/GNURoot/home.
Your latest plots (.png files) can be found in an external storage directory setup for you. Often at /sdcard/GNURoot/intents.
You will be running in a fake chroot of sorts which includes Octave and many of the programs you expect to find in a standard GNU/Linux (read Debian) install.
Plot commands and edit commands fire off intents to use whatever image viewer or text editor you have.
See Octave Documentation:
File bugs and feature requests here:
Source code here: